Enantiosensitive locking of photoelectron spin and cation orientation

• URL: http://arxiv.org/abs/2505.22433v4
• Date: Tue, 05 Aug 2025 02:18:29 GMT
• Title: Enantiosensitive locking of photoelectron spin and cation orientation
• Authors: Philip Caesar M. Flores, Stefanos Carlström, Serguei Patchkovskii, Misha Ivanov, Vladimiro Mujica, Andres F. Ordonez, Olga Smirnova,
• Abstract summary: Chirality describes the asymmetry between an object and its mirror image, underpinning diverse functionalities across all scales.<n>A particularly intriguing example is chirality-induced spin selectivity (CISS), where chiral structures orient electron spins enantio-sensitively.<n>Here, we examine the simplest scenario: spin-resolved photoionization of randomly oriented chiral molecules.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Chirality describes the asymmetry between an object and its mirror image, underpinning diverse functionalities across all scales of matter-from molecules and aggregates to thin films and bulk chiral materials. A particularly intriguing example is chirality-induced spin selectivity (CISS), where chiral structures orient electron spins enantio-sensitively. Despite extensive research, the fundamental origin of spin-chirality coupling, the unexpectedly large magnitude of the CISS effect, and the possible role of electromagnetic fields remain unclear. Here, we address these issues by examining the simplest scenario: spin-resolved photoionization of randomly oriented chiral molecules. We uncover two universal geometric mechanisms of spin-selective photodynamics, arising solely from electric-dipole interactions and previously unrecognized. These mechanisms operate effectively even in amorphous chiral media under isotropic illumination and persist at weak spin-orbit coupling, underscoring fundamental aspects of spin-chirality interplay. We further identify an unreported phenomenon central to CISS: locking of photoelectron spin orientation to molecular geometry. Our findings provide a unified geometric framework with broad implications, extending from CISS and asymmetric catalysis to spin textures in chiral crystals and chiral quantum materials such as Weyl semimetals.

Related papers

• Harnessing Chiral Spin States in Molecular Nanomagnets for Quantum Technologies [44.1973928137492]
  We show that chiral qubits naturally suppress always-on interactions that can not be switched off in weakly coupled qubits.<n>Our findings establish spin chirality engineering as a promising strategy for mitigating always-on interaction in entangling two chiral qubits in molecular quantum technologies.
  arXiv  Detail & Related papers  (2025-01-21T08:23:12Z)
• Enhancement of Chiral-Induced Spin Selectivity via Circularly Polarized Light [4.788427041690547]
  We show how circularly polarized (CP) light enhances CISS effects through strong light-matter interactions. Our predictions can be very useful in experiments for using CP light to control spin current in chiral molecular junctions.
  arXiv  Detail & Related papers  (2024-02-01T02:13:33Z)
• Directional spontaneous emission in photonic crystal slabs [49.1574468325115]
  Spontaneous emission is a fundamental out-of-equilibrium process in which an excited quantum emitter relaxes to the ground state due to quantum fluctuations. One way to modify these photon-mediated interactions is to alter the dipole radiation patterns of the emitter, e.g., by placing photonic crystals near them. Our study delves into the interaction between these directional emission patterns and the aforementioned variables, revealing the untapped potential to fine-tune collective quantum optical phenomena.
  arXiv  Detail & Related papers  (2023-12-04T15:35:41Z)
• Chirality-induced emergent spin-orbit coupling in topological atomic lattices [0.0]
  We show that optical excitations in lattices of V-type atoms exhibit an emergent spin-orbit coupling when the geometry is chiral.<n>We demonstrate that chirality-induced spin-orbit coupling can result from either the chirality of the underlying lattice geometry or the combination of an achiral lattice with a suitably chosen external quantization axis.
  arXiv  Detail & Related papers  (2023-11-15T19:00:13Z)
• Floquet-engineered chiral-induced spin selectivity [0.0]
  We show that CISS can be observed in achiral systems driven by an external circularly polarized laser field in the framework of Floquet engineering. To obtain a wider range of energies for large spin polarization, a combination of chiral molecules and light-matter interactions is considered.
  arXiv  Detail & Related papers  (2023-02-20T07:06:17Z)
• Towards Quantum Sensing of Chiral-Induced Spin Selectivity: Probing Donor-Bridge-Acceptor Molecules with NV Centers in Diamond [0.0]
  Photoexcitable donor-bridge-acceptor molecules that support intramolecular charge transfer are ideal platforms to probe the influence of chiral-induced spin selectivity (CISS) in electron transfer and resulting radical pairs. We introduce a quantum sensing scheme to measure directly the hypothesized spin polarization in radical pairs using shallow nitrogen-vacancy centers in diamond at the single- to few-molecule level. We highlight the perturbative nature of the electron spin-spin dipolar coupling within the radical pair, and demonstrate how Lee-Goldburg decoupling can preserve spin polarization in D-B-A molecules for enantioselective detection by
  arXiv  Detail & Related papers  (2023-02-03T13:33:30Z)
• Bipolar single-molecule electroluminescence and electrofluorochromism [50.591267188664666]
  We investigate cationic and anionic fluorescence of individual zinc phthalocyanine (ZnPc) molecules adsorbed on ultrathin NaCl films on Ag (111) by using STML. They depend on the tip-sample bias polarity and appear at threshold voltages that are correlated with the onset energies of particular molecular orbitals.
  arXiv  Detail & Related papers  (2022-10-20T09:22:45Z)
• Sensing of magnetic field effects in radical-pair reactions using a quantum sensor [50.591267188664666]
  Magnetic field effects (MFE) in certain chemical reactions have been well established in the last five decades. We employ elaborate and realistic models of radical-pairs, considering its coupling to the local spin environment and the sensor. For two model systems, we derive signals of MFE detectable even in the weak coupling regime between radical-pair and NV quantum sensor.
  arXiv  Detail & Related papers  (2022-09-28T12:56:15Z)
• Chiral cavity induced spin selectivity [0.0]
  Chiral-induced spin selectivity (CISS) is a phenomenon in which electron spins are polarized as they are transported through chiral molecules. We show that spin selectivity can be realized in achiral materials by coupling electrons to a single mode of a chiral optical cavity.
  arXiv  Detail & Related papers  (2022-09-25T07:25:23Z)
• Interplay of Structural Chirality, Electron Spin and Topological Orbital in Chiral Molecular Spin Valves [0.0]
  Chirality has been a property of central importance in chemistry and biology for more than a century, and is now taking on increasing relevance in condensed matter physics. electrons were found to become spin polarized after transmitting through chiral molecules, crystals, and their hybrids. This phenomenon, called chirality-induced spin selectivity (CISS), presents broad application potentials and far-reaching fundamental implications.
  arXiv  Detail & Related papers  (2022-09-16T18:05:29Z)
• Probing dynamics of a two-dimensional dipolar spin ensemble using single qubit sensor [62.997667081978825]
  We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal. We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder. Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
  arXiv  Detail & Related papers  (2022-07-21T18:00:17Z)
• Fast electrons interacting with chiral matter: mirror symmetry breaking of quantum decoherence and lateral momentum transfer [91.3755431537592]
  We show that matter chirality breaks mirror symmetry of scattered electrons quantum decoherence. We also prove that mirror asymmetry also shows up in the distribution of the electron lateral momentum.
  arXiv  Detail & Related papers  (2022-04-07T15:06:27Z)
• Rapidly enhanced spin polarization injection in an optically pumped spin ratchet [49.1301457567913]
  We report on a strategy to boost the spin injection rate by exploiting electrons that can be rapidly polarized. We demonstrate this in a model system of Nitrogen Vacancy center electrons injecting polarization into a bath of 13C nuclei in diamond. Through a spin-ratchet polarization transfer mechanism, we show boosts in spin injection rates by over two orders of magnitude.
  arXiv  Detail & Related papers  (2021-12-14T08:23:10Z)
• Inverted fine structure of a 6H-SiC qubit enabling robust spin-photon interface [0.0]
  A type of silicon vacancy qubits in 6H-SiC possesses an unusual inverted fine structure. This results in the directional emission of light along the hexagonal crystallographic axis, making photon extraction more efficient. Our experimental and theoretical approaches provide a deep insight into the optical and spin properties of atomic-scale qubits in SiC.
  arXiv  Detail & Related papers  (2021-07-14T20:58:22Z)
• Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(II) [52.259804540075514]
  We report the existence of a sizeable quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes. The level anti-crossing, or magnetic clock transition, associated with this gap has been directly monitored by heat capacity experiments. The comparison of these results with those obtained for a Co derivative, for which tunnelling is forbidden by symmetry, shows that the clock transition leads to an effective suppression of intermolecular spin-spin interactions.
  arXiv  Detail & Related papers  (2021-03-04T13:31:40Z)
• Chiral Induced Spin Selectivity as a Spontaneous Intertwined Order [2.808255698770643]
  Chiral induced spin selectivity (CISS) describes efficient spin filtering by chiral molecules. Here we report a multi-orbital theory for CISS, where an effective spin-orbit interaction (SOI) emerges from spontaneous formation of electron-hole pairing. Our theory may provide important guidance for searching other molecules with CISS effects.
  arXiv  Detail & Related papers  (2020-05-07T17:59:59Z)
• Quantum coherent spin-electric control in a molecular nanomagnet at clock transitions [57.50861918173065]
  Electrical control of spins at the nanoscale offers architectural advantages in spintronics. Recent demonstrations of electric-field (E-field) sensitivities in molecular spin materials are tantalising. E-field sensitivities reported so far are rather weak, prompting the question of how to design molecules with stronger spin-electric couplings.
  arXiv  Detail & Related papers  (2020-05-03T09:27:31Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.